Neil
Catherine
Ray
Grant
James Cleverill
Headmaster
Fenella
Rosie
Miss Pringle
Fiona
Dennis the Dog
Dennis the Dog (voice)
Chief Alien (voice)
Nasty Alien (voice)
Salubrious Gat (voice)
Scientist Alien (voice) / Van Driver
Kindly Alien (voice)
Steve
Canteen Lady
Sandwich Girl
Lavender
Self
Policeman
Reporter
